Perhaps you should try some spelling variations:
"thuong lan code snippets" » "thuong han code snippets", "phuong lan code snippets", "thuong mai code snippets", "thuong lbm code snippets", "thuong lan code slippers"
"using a code snippets" » "using a code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using a code snippets") or ("thuong lan code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("thuong lan code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using a code snippets ) or ( thuong lan code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a code snippets") or ("thuong lan code snippets"))) or ("locating bug code snippets"))*.